278 lines
12 KiB
Python
278 lines
12 KiB
Python
#!/usr/bin/env python3
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"""ppclock BLE bridge 服务端 —— 在蓝牙物理所在机（host-win）原生运行。
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依赖：pip install bleak（仅此一个，Windows 用 WinRT 后端）。
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运行：python bridge_server.py [--host 0.0.0.0] [--port 8971]
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协议：JSONL over TCP。每行一个请求 {"id":N,"op":...}，
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响应 {"id":N,"ok":bool,"data":...,"error":...}；OTA 期间穿插
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{"event":"ota_progress",...} 事件。单 BLE 设备会话按连接串行化。
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RPC：
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ping → {pong, version, platform}
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scan {timeout} → {devices:[{name,address,rssi}]}
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connect {address} → {}（连接+服务发现+订阅 RXTX notify）
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write {char,data,response}→ {}（char: "epd"|"rxtx"，data: hex）
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read {char} → {data: hex}
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request_device_id {timeout}→ {device_id}（EFEF + 收集 14B notify）
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ota {image} → {blocks, bytes}（image: hex；完整 SUOTA）
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close → {}
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"""
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from __future__ import annotations
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import argparse
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import asyncio
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import json
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import platform
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import sys
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PROTOCOL_VERSION = 1
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SERVER_BUILD = 5 # 2026-07-28: SUOTA SERV_STATUS 实机校正为 5f78df94（h=38 notify）
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EPD_SERVICE_UUID = "13187b10-eba9-a3ba-044e-83d3217d9a38"
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EPD_CHAR_UUID = "4b646063-6264-f3a7-8941-e65356ea82fe"
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RXTX_SERVICE_UUID = "00001f10-0000-1000-8000-00805f9b34fb"
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RXTX_CHAR_UUID = "00001f1f-0000-1000-8000-00805f9b34fb"
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# 固件分析（firmware-analysis §2/§3）：0x221f 服务的 0x331f 特征（handle 0x0B）
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# 与 0x1f1f（handle 7）同入命令分发器；部分固件 notify 能力挂在 331f 上
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ALT_NOTIFY_UUID = "0000331f-0000-1000-8000-00805f9b34fb"
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DEVICE_NAME_PREFIX = "NRF-"
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SPOTA_SERVICE_UUID = "0000fef5-0000-1000-8000-00805f9b34fb"
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SPOTA_SERV_STATUS_UUID = "5f78df94-798c-46f5-990a-b3eb6a065c88" # 实机 h=38 notify（64b4e8b5 仅 read）
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SPOTA_MEM_DEV_UUID = "8082caa8-41a6-4021-91c6-56f9b954cc34"
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SPOTA_GPIO_MAP_UUID = "724249f0-5ec3-4b5f-8804-42345af08651"
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SPOTA_PATCH_DATA_UUID = "457871e8-d516-4ca1-9116-57d0b17b9cb2"
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SPOTA_PATCH_LEN_UUID = "9d84b9a3-000c-49d8-9183-855b673fda31"
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MEM_DEV_SPI_FLASH = bytes([0x00, 0x00, 0x00, 0x13])
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GPIO_MAP_DEFAULT = bytes([0x00, 0x00, 0x06, 0x05])
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END_SIGNAL = bytes([0x00, 0x00, 0x00, 0xFE])
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REBOOT_SIGNAL = bytes([0x00, 0x00, 0x00, 0xFD])
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BLOCK_SIZE = 240
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WRITE_CHUNK = 20
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STATUS_OK = 2
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CHARS = {"epd": EPD_CHAR_UUID, "rxtx": RXTX_CHAR_UUID, "alt": ALT_NOTIFY_UUID}
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# 实机 GATT（2026-07-28 bridge 诊断）：1f1f(h=53)=仅write 无 notify；
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# 331f(h=57)=notify+write+read，为真交互通道；EPD(h=48)=notify+write
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def parse_device_id(data: bytes) -> str:
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if all(0x20 <= b < 0x7F for b in data):
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return data.decode("ascii")
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return data.hex().upper()
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class BleSession:
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"""单设备 BLE 会话（bleak），与 ppclock.transport.BLETransport 同语义。"""
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def __init__(self):
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self.client = None
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self.notify_char = None
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self._id_buf = bytearray()
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self._id_event = asyncio.Event()
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async def scan(self, timeout: float):
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from bleak import BleakScanner
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found = await BleakScanner.discover(timeout=timeout, return_adv=True)
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out = []
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for addr, (dev, adv) in found.items():
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name = dev.name or adv.local_name or ""
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if name.startswith(DEVICE_NAME_PREFIX):
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out.append({"name": name, "address": dev.address, "rssi": adv.rssi})
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return {"devices": out}
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async def connect(self, address: str, timeout: float = 15.0):
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from bleak import BleakClient, BleakScanner
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await self.close()
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# Windows/WinRT 按地址直连常解析失败——先扫描拿到 BLEDevice（含地址类型/广播数据）再连
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deadline = asyncio.get_event_loop().time() + timeout
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dev = None
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while True:
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remain = deadline - asyncio.get_event_loop().time()
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if remain <= 0:
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break
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dev = await BleakScanner.find_device_by_address(
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address, timeout=min(5.0, max(1.0, remain)))
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if dev is not None:
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break
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if dev is None:
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raise RuntimeError(f"设备解析失败（扫描未见 {address}）")
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self.client = BleakClient(dev, timeout=timeout)
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await self.client.connect()
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# notify 全订阅：331f（主）+ 1f1f（部分固件）+ EPD（设备 ID 也可能经此应答）
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self.notify_char = []
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for uuid in (ALT_NOTIFY_UUID, RXTX_CHAR_UUID, EPD_CHAR_UUID):
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try:
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await self.client.start_notify(uuid, self._on_notify)
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self.notify_char.append(uuid)
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except Exception:
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continue
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table = self._gatt_table()
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return {"address": address, "name": dev.name,
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"notify_char": self.notify_char, "gatt": table}
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def _gatt_table(self):
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table = []
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for s in self.client.services:
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for c in s.characteristics:
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table.append({"service": str(s.uuid), "char": str(c.uuid),
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"handle": c.handle, "props": list(c.properties)})
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return table
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def _on_notify(self, _sender, data: bytearray):
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self._id_buf.extend(data)
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if len(self._id_buf) >= 14:
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self._id_event.set()
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async def write(self, char: str, data: bytes, response: bool):
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await self.client.write_gatt_char(CHARS[char], data, response=response)
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return {"sent": len(data)}
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async def read(self, char: str):
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return {"data": bytes(await self.client.read_gatt_char(CHARS[char])).hex()}
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async def request_device_id(self, timeout: float = 8.0):
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self._id_buf.clear()
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self._id_event.clear()
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# EFEF 走 331f（实机证据：1f1f 仅 ATT-ACK 不执行命令，331f 为活通道）
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await self.client.write_gatt_char(ALT_NOTIFY_UUID, bytes([0xEF, 0xEF]), response=True)
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await asyncio.wait_for(self._id_event.wait(), timeout)
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return {"device_id": parse_device_id(bytes(self._id_buf[:14]))}
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async def ota(self, image: bytes, status_timeout: float = 60.0):
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if SPOTA_SERVICE_UUID not in [str(s.uuid) for s in self.client.services]:
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raise RuntimeError("设备不存在 fef5 SUOTA 服务")
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status_q: asyncio.Queue[int] = asyncio.Queue()
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def _on_status(_s, data: bytearray):
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status_q.put_nowait(int.from_bytes(bytes(data), "little"))
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async def wait_ok(what: str):
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status = await asyncio.wait_for(status_q.get(), status_timeout)
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if status != STATUS_OK:
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raise RuntimeError(f"{what} 失败: 状态码 {status}")
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acc = 0
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for b in image:
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acc ^= b
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payload = image + bytes([acc])
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blocks = [payload[i:i + BLOCK_SIZE] for i in range(0, len(payload), BLOCK_SIZE)]
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await self.client.start_notify(SPOTA_SERV_STATUS_UUID, _on_status)
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events = []
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try:
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await self.client.write_gatt_char(SPOTA_MEM_DEV_UUID, MEM_DEV_SPI_FLASH, response=True)
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await self.client.write_gatt_char(SPOTA_GPIO_MAP_UUID, GPIO_MAP_DEFAULT, response=True)
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for idx, block in enumerate(blocks, 1):
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await self.client.write_gatt_char(SPOTA_PATCH_LEN_UUID,
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len(block).to_bytes(2, "little"), response=True)
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for i in range(0, len(block), WRITE_CHUNK):
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await self.client.write_gatt_char(SPOTA_PATCH_DATA_UUID,
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block[i:i + WRITE_CHUNK], response=False)
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await wait_ok(f"块 {idx}/{len(blocks)}")
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events.append({"block": idx, "total": len(blocks)})
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yield {"event": "ota_progress", "block": idx, "total": len(blocks)}
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await self.client.write_gatt_char(SPOTA_MEM_DEV_UUID, END_SIGNAL, response=True)
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await wait_ok("镜像校验")
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await self.client.write_gatt_char(SPOTA_MEM_DEV_UUID, REBOOT_SIGNAL, response=True)
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finally:
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try:
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await self.client.stop_notify(SPOTA_SERV_STATUS_UUID)
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except Exception:
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pass
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async def close(self):
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if self.client is not None:
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try:
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if self.client.is_connected:
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await self.client.disconnect()
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finally:
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self.client = None
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class BridgeServer:
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def __init__(self):
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self.ble = BleSession()
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self._ble_lock = asyncio.Lock()
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async def handle(self, reader: asyncio.StreamReader, writer: asyncio.StreamWriter):
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peer = writer.get_extra_info("peername")
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print(f"[bridge] client {peer} connected", flush=True)
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async def send(obj):
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writer.write((json.dumps(obj, ensure_ascii=False) + "\n").encode())
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await writer.drain()
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try:
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async for line in reader:
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line = line.strip()
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if not line:
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continue
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try:
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req = json.loads(line)
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rid = req.get("id")
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op = req["op"]
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except (KeyError, ValueError) as e:
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await send({"id": None, "ok": False, "error": f"bad request: {e}"})
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continue
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try:
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async with self._ble_lock:
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if op == "ota":
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gen = self.ble.ota(bytes.fromhex(req["image"]))
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async for ev in gen:
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await send(ev)
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data = {"done": True}
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else:
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data = await self._dispatch(op, req)
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await send({"id": rid, "ok": True, "data": data})
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except Exception as e:
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await send({"id": rid, "ok": False,
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"error": f"{type(e).__name__}: {e}"})
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finally:
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await self.ble.close()
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writer.close()
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print(f"[bridge] client {peer} disconnected", flush=True)
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async def _dispatch(self, op: str, req: dict):
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if op == "ping":
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return {"pong": True, "version": PROTOCOL_VERSION,
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"build": SERVER_BUILD,
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"platform": platform.system()}
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if op == "scan":
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return await self.ble.scan(float(req.get("timeout", 5.0)))
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if op == "connect":
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return await self.ble.connect(req["address"], float(req.get("timeout", 15.0)))
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if op == "write":
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return await self.ble.write(req["char"], bytes.fromhex(req["data"]),
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bool(req.get("response", True)))
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if op == "read":
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return await self.ble.read(req["char"])
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if op == "request_device_id":
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return await self.ble.request_device_id(float(req.get("timeout", 8.0)))
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if op == "close":
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return await self.ble.close() or {}
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if op == "services":
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return {"gatt": self.ble._gatt_table(), "notify_char": self.ble.notify_char}
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raise ValueError(f"unknown op {op!r}")
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async def main():
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ap = argparse.ArgumentParser(description="ppclock BLE bridge server")
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ap.add_argument("--host", default="0.0.0.0")
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ap.add_argument("--port", type=int, default=8971)
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args = ap.parse_args()
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server = BridgeServer()
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srv = await asyncio.start_server(server.handle, args.host, args.port)
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print(f"[bridge] listening on {args.host}:{args.port} "
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f"(protocol v{PROTOCOL_VERSION}, platform {platform.system()})", flush=True)
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async with srv:
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await srv.serve_forever()
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if __name__ == "__main__":
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try:
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asyncio.run(main())
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except KeyboardInterrupt:
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sys.exit(0)
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