mirror of
https://github.com/xinnan-tech/xiaozhi-esp32-server.git
synced 2026-07-28 01:53:53 +08:00
650 lines
25 KiB
Python
650 lines
25 KiB
Python
import asyncio
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import json
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import time
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import uuid
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from typing import Dict, Any, Optional, Callable
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from config.logger import setup_logging
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from core.utils.mqtt_auth import validate_mqtt_credentials
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logger = setup_logging()
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class MQTTConnection:
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"""
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MQTT连接处理类：管理单个MQTT客户端连接
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处理MQTT协议消息和会话管理
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"""
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def __init__(self, socket, connection_id: int, mqtt_server, udp_handler=None, reader=None, writer=None):
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self.socket = socket
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self.reader = reader
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self.writer = writer
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self.connection_id = connection_id
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self.mqtt_server = mqtt_server
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self.udp_handler = udp_handler
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# 连接信息
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self.client_id = None
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self.device_id = None
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self.username = None
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self.password = None
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self.session_id = None
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# 协议状态
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self.is_connected_flag = False
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self.keep_alive_interval = 0
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self.last_activity = time.monotonic()
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# 消息处理
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self.message_callback = None
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self.reply_topic = None
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# UDP相关
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self.udp_config = None
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self.message_queue_size = int(
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getattr(mqtt_server, "message_queue_size", 128) or 128
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)
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self.business_ready_timeout = float(
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getattr(mqtt_server, "business_ready_timeout", 30) or 30
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)
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self.close_timeout = max(
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0.1, float(getattr(mqtt_server, "close_timeout", 2) or 2)
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)
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self.goodbye_timeout = max(
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0.1, float(getattr(mqtt_server, "goodbye_timeout", 1) or 1)
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)
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# 任务管理
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self.keep_alive_task = None
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self.business_task = None
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self._closed = False
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self._close_task = None
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self._close_initiator = None
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self._close_complete = asyncio.Event()
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self.connect_processed_event = asyncio.Event()
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self.connect_accepted = False
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self.business_ready_event = asyncio.Event()
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self._hello_business_ready_event = None
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self._hello_business_session_id = None
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self._logical_hello_received = False
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self._startup_recovery_task = None
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self._session_transition_lock = asyncio.Lock()
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self._last_goodbye_session_id = None
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self._goodbye_lock = asyncio.Lock()
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# 创建MQTT协议处理器
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from core.protocols.mqtt_protocol import MQTTProtocol
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self.protocol = MQTTProtocol(
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socket=socket,
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reader=reader,
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writer=writer,
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max_payload_size=getattr(mqtt_server, "max_payload_size", 8192),
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event_queue_size=self.message_queue_size,
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close_timeout=self.close_timeout,
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)
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self._setup_protocol_handlers()
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def _setup_protocol_handlers(self):
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"""设置协议事件处理"""
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self.protocol.on('connect', self._handle_connect)
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self.protocol.on('publish', self._handle_publish)
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self.protocol.on('subscribe', self._handle_subscribe)
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self.protocol.on('disconnect', self._handle_disconnect)
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self.protocol.on('close', self._handle_close)
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self.protocol.on('error', self._handle_error)
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self.protocol.on('protocolError', self._handle_error)
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self.protocol.on('activity', self._handle_activity)
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def _handle_activity(self):
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"""更新最近活动时间（用于心跳保活）"""
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self.last_activity = time.monotonic()
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async def _handle_connect(self, connect_data: Dict[str, Any]):
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"""处理CONNECT消息"""
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try:
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if self.connect_processed_event.is_set() or self.is_connected_flag:
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logger.warning("同一TCP连接收到重复CONNECT，关闭连接")
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await self.close()
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return
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self.client_id = connect_data['clientId']
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self.username = connect_data.get('username')
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self.password = connect_data.get('password')
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self.keep_alive_interval = connect_data.get('keepAlive', 0) * 1000 # 转换为毫秒
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logger.info(f"MQTT客户端连接: {self.client_id}")
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try:
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validate_mqtt_credentials(
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self.client_id,
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self.username,
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self.password,
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self.mqtt_server.signature_key,
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)
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except ValueError as e:
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logger.warning(f"MQTT客户端认证失败: {self.client_id}, {e}")
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await self.protocol.send_connack(4)
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self.connect_processed_event.set()
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await self.close()
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return False
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# 解析客户端ID获取设备信息
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if not self._parse_client_id():
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await self.protocol.send_connack(1) # 连接被拒绝
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self.connect_processed_event.set()
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await self.close()
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return False
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# 生成会话ID
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self.session_id = str(uuid.uuid4())
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# 设置回复主题
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self.reply_topic = f"devices/p2p/{self.device_id.replace(':', '_')}"
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async def complete_acceptance():
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# Keep this inside the server's per-client takeover lock. A
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# newer connection cannot reclaim this clientId between the
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# success CONNACK and publishing the active owner.
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self.is_connected_flag = True
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try:
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await self.protocol.send_connack(0)
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except Exception:
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self.is_connected_flag = False
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raise
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if self.keep_alive_interval > 0:
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self.keep_alive_task = asyncio.create_task(
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self._keep_alive_check()
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)
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self.connect_accepted = True
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accepted = await self.mqtt_server.on_client_connected(
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self, complete_acceptance
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)
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if not accepted:
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if not self._closed:
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await self.protocol.send_connack(3) # 服务端暂不可用
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self.connect_processed_event.set()
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await self.close()
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return False
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self.connect_processed_event.set()
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return True
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except Exception as e:
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logger.error(f"处理CONNECT消息失败: {e}")
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self.connect_processed_event.set()
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await self.close()
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return False
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def _parse_client_id(self) -> bool:
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"""解析客户端ID获取设备信息"""
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try:
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# 支持格式: GID_test@@@mac_address@@@uuid 或 GID_test@@@mac_address
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parts = self.client_id.split('@@@')
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if len(parts) >= 2:
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self.group_id = parts[0]
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# 将设备标识统一为服务端使用的MAC地址格式
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self.device_id = (
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parts[1].replace('_', ':').replace('-', ':').lower()
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)
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if len(parts) >= 3:
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self.uuid = parts[2]
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return True
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else:
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logger.error(f"无效的客户端ID格式: {self.client_id}")
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return False
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except Exception as e:
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logger.error(f"解析客户端ID失败: {e}")
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return False
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async def _handle_publish(self, publish_data: Dict[str, Any]):
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"""处理PUBLISH消息"""
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try:
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if publish_data.get('qos', 0) != 0:
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logger.warning(
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f"不支持的MQTT QoS级别: {publish_data.get('qos')}"
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)
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await self.close()
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return
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topic = publish_data['topic']
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payload = publish_data['payload']
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logger.debug(f"收到MQTT发布消息: topic={topic}, payload={payload}")
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# 更新活动时间
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self.last_activity = time.monotonic()
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# 解析JSON消息
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try:
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message_data = json.loads(payload)
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# 处理不同类型的消息
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if message_data.get('type') == 'hello':
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if message_data.get('version', 3) != 3:
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logger.warning(
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f"不支持的MQTT协议版本: {message_data.get('version')}"
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)
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await self.close()
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return
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await self._handle_hello_message(message_data)
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else:
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# 其他消息通过回调处理
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if self.message_callback:
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self.message_callback(topic, payload)
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except json.JSONDecodeError:
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logger.error(f"MQTT消息JSON解析失败: {payload}")
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except Exception as e:
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logger.error(f"处理PUBLISH消息失败: {e}")
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async def _handle_hello_message(self, message_data: Dict[str, Any]):
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"""处理hello消息，初始化UDP配置"""
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async with self._session_transition_lock:
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self._logical_hello_received = True
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try:
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handle_logical_hello = getattr(
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self.mqtt_server, "handle_logical_hello", None
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)
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if callable(handle_logical_hello):
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await handle_logical_hello(self)
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# Match the gateway contract: do not advertise a usable audio
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# channel until private config and runtime components are ready.
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await asyncio.wait_for(
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self.business_ready_event.wait(),
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timeout=self.business_ready_timeout,
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)
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if self._closed or not self.is_connected_flag:
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return
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hello_reply = self._prepare_hello_reply(
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message_data.get('audio_params', {}),
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message_data.get('version', 3),
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)
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hello_ready = asyncio.Event()
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self._hello_business_ready_event = hello_ready
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self._hello_business_session_id = self.session_id
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# Enqueue the logical-session boundary before the device can react
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# to the reply with UDP audio.
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if self.message_callback:
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try:
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self.message_callback(self.reply_topic, json.dumps(message_data))
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except Exception as e:
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logger.error(f"转发hello消息失败: {e}")
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# Long-lived MQTT connections can change Agent configuration at
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# each logical Hello. Do not expose the new UDP session until the
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# business runtime has either refreshed or deliberately retained
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# the previous healthy runtime.
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await asyncio.wait_for(
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hello_ready.wait(),
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timeout=self.business_ready_timeout,
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)
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if self._closed or not self.is_connected_flag:
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return
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await self.send_message(self.reply_topic, json.dumps(hello_reply))
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logger.info(f"MQTT Hello消息处理完成: {self.client_id}")
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except asyncio.TimeoutError:
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logger.error(
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f"MQTT Hello等待业务运行时超时: {self.client_id}, "
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f"timeout={self.business_ready_timeout}s"
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)
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await self.close()
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except Exception as e:
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logger.error(f"处理hello消息失败: {e}")
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finally:
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self._hello_business_ready_event = None
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self._hello_business_session_id = None
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def schedule_stale_session_recovery(self, delay: float = 1.0) -> None:
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"""Return a reconnected device with a stale UDP session to Idle."""
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if self._startup_recovery_task is not None:
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return
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self._startup_recovery_task = asyncio.create_task(
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self._recover_stale_session(delay)
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)
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async def _recover_stale_session(self, delay: float) -> None:
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try:
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await asyncio.sleep(max(0.0, delay))
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async with self._session_transition_lock:
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if (
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self._closed
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or not self.is_connected_flag
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or self._logical_hello_received
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or not self.reply_topic
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):
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return
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# No session id is intentional: firmware accepts this as a
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# connection-level reset and discards an UDP session owned by
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# a previous server process. Serialize it with Hello so this
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# reset can never overtake a newly negotiated session.
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await self.send_message(
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self.reply_topic,
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json.dumps({"type": "goodbye"}),
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)
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logger.info("已通知重连MQTT设备清理旧UDP会话: {}", self.client_id)
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.warning("通知重连MQTT设备清理旧会话失败: {}", e)
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def mark_business_session_ready(self, session_id: str = None) -> None:
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"""Acknowledge readiness for the currently pending logical Hello."""
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event = self._hello_business_ready_event
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pending_session_id = self._hello_business_session_id
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if event is None:
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return
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if session_id is not None and pending_session_id != session_id:
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return
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event.set()
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async def send_hello_reply(self, audio_params: Dict[str, Any], version: int = 3):
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"""发送hello回复（可在未收到设备hello时调用）"""
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hello_reply = self._prepare_hello_reply(audio_params, version)
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await self.send_message(self.reply_topic, json.dumps(hello_reply))
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def _prepare_hello_reply(self, audio_params: Dict[str, Any], version: int = 3):
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"""Create and install one UDP session without publishing it yet."""
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import os
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self.session_id = str(uuid.uuid4())
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self._last_goodbye_session_id = None
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udp_session_id = self.mqtt_server.bind_udp_session(
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self, self.udp_handler
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)
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nonce = self._generate_udp_header(
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0, 0, 0, connection_id=udp_session_id
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)
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self.udp_config = {
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'key': os.urandom(16),
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'encryption': 'aes-128-ctr',
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'server': self.mqtt_server.public_endpoint,
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'port': self.mqtt_server.udp_port,
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'nonce': nonce,
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'local_sequence': 0,
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'remote_sequence': 0
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}
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if self.udp_handler:
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self.udp_handler.configure_encryption(self.udp_config)
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configured_audio_params = (
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getattr(self.mqtt_server, 'config', {})
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.get('xiaozhi', {})
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.get('audio_params', {})
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)
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hello_reply = {
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'type': 'hello',
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'version': version,
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'session_id': self.session_id,
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'transport': 'udp',
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'udp': {
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'server': self.udp_config['server'],
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'port': self.udp_config['port'],
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'encryption': self.udp_config['encryption'],
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'key': self.udp_config['key'].hex(),
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'nonce': nonce.hex()
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},
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'audio_params': configured_audio_params or audio_params or {}
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}
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return hello_reply
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def _generate_udp_header(
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self, length: int, timestamp: int, sequence: int,
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connection_id: int = None
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) -> bytes:
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header = bytearray(16)
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header[0] = 1 # type
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header[2:4] = length.to_bytes(2, 'big')
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udp_connection_id = connection_id or self.connection_id
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header[4:8] = udp_connection_id.to_bytes(4, 'big')
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header[8:12] = timestamp.to_bytes(4, 'big')
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header[12:16] = sequence.to_bytes(4, 'big')
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return bytes(header)
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async def _handle_subscribe(self, subscribe_data: Dict[str, Any]):
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"""处理SUBSCRIBE消息"""
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try:
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topic = subscribe_data['topic']
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packet_id = subscribe_data['packetId']
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logger.debug(f"客户端订阅主题: {topic}")
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# 发送订阅确认
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await self.protocol.send_suback(packet_id, 0)
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except Exception as e:
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logger.error(f"处理SUBSCRIBE消息失败: {e}")
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async def _handle_disconnect(self):
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"""处理DISCONNECT消息"""
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logger.info(f"客户端主动断开连接: {self.client_id}")
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await self.close()
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async def _handle_close(self):
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"""处理连接关闭"""
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logger.info(f"MQTT连接关闭: {self.client_id}")
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await self.close()
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async def _handle_error(self, error):
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"""处理连接错误"""
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logger.error(f"MQTT连接错误: {self.client_id}, error: {error}")
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await self.close()
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async def _keep_alive_check(self):
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"""心跳检查任务"""
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try:
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while self.is_connected_flag and not self._closed:
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await asyncio.sleep(self.keep_alive_interval / 1000 / 2) # 检查间隔为心跳间隔的一半
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current_time = time.monotonic()
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if current_time - self.last_activity > self.keep_alive_interval / 1000 * 1.5:
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logger.info(f"MQTT客户端心跳超时: {self.client_id}")
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try:
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await asyncio.wait_for(
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self.notify_device_idle(),
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timeout=self.goodbye_timeout,
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)
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except Exception as e:
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logger.warning(
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"MQTT心跳超时发送goodbye失败，继续关闭连接: {}", e
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)
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finally:
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await self.close()
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break
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.error(f"心跳检查任务出错: {e}")
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def set_message_callback(self, callback: Callable[[str, str], None]):
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"""设置消息接收回调"""
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self.message_callback = callback
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async def send_message(self, topic: str, payload: str):
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"""发送MQTT消息"""
|
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if self._closed or not self.is_connected_flag:
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raise RuntimeError("MQTT connection is closed")
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try:
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|
await self.protocol.send_publish(topic, payload, qos=0)
|
|
logger.debug(f"发送MQTT消息: topic={topic}, payload={payload}")
|
|
|
|
except Exception as e:
|
|
logger.error(f"发送MQTT消息失败: {e}")
|
|
raise
|
|
|
|
async def notify_device_idle(self, session_id: str = None) -> bool:
|
|
"""Send one session-scoped goodbye before the physical MQTT close."""
|
|
async with self._goodbye_lock:
|
|
target_session_id = session_id or self.session_id
|
|
if (
|
|
self._closed
|
|
or not self.is_connected_flag
|
|
or not self.udp_config
|
|
or not self.reply_topic
|
|
or not target_session_id
|
|
or self._last_goodbye_session_id == target_session_id
|
|
):
|
|
return False
|
|
|
|
await self.send_message(
|
|
self.reply_topic,
|
|
json.dumps(
|
|
{"type": "goodbye", "session_id": target_session_id}
|
|
),
|
|
)
|
|
self._last_goodbye_session_id = target_session_id
|
|
return True
|
|
|
|
def is_connected(self) -> bool:
|
|
"""检查连接状态"""
|
|
return self.is_connected_flag and not self._closed
|
|
|
|
async def close(self):
|
|
"""关闭连接"""
|
|
if not self._closed:
|
|
self._closed = True
|
|
self.is_connected_flag = False
|
|
self.connect_processed_event.set()
|
|
self.business_ready_event.set()
|
|
if self._hello_business_ready_event is not None:
|
|
self._hello_business_ready_event.set()
|
|
# Run cleanup in a dedicated task. Shielding it lets a cancelled
|
|
# first caller leave without falsely completing the close barrier;
|
|
# later callers can still await the same cleanup owner.
|
|
self._close_initiator = asyncio.current_task()
|
|
self._close_task = asyncio.create_task(self._close_impl())
|
|
|
|
close_task = self._close_task
|
|
if close_task is None:
|
|
return
|
|
|
|
current_task = asyncio.current_task()
|
|
dependency_tasks = {
|
|
close_task,
|
|
getattr(self.protocol, "_processing_task", None),
|
|
getattr(self.protocol, "_dispatch_task", None),
|
|
}
|
|
if self.business_task is not self._close_initiator:
|
|
dependency_tasks.add(self.business_task)
|
|
if self.keep_alive_task is not self._close_initiator:
|
|
dependency_tasks.add(self.keep_alive_task)
|
|
# The dedicated closer can be waiting for these tasks. Let them unwind
|
|
# instead of creating a reverse wait cycle.
|
|
if current_task in dependency_tasks:
|
|
return
|
|
await asyncio.shield(close_task)
|
|
|
|
async def _close_impl(self):
|
|
"""Own and complete physical cleanup independently of caller lifetime."""
|
|
try:
|
|
current_task = asyncio.current_task()
|
|
|
|
# The socket/protocol task can time out while ConnectionService is
|
|
# blocked in private config or component initialization. Cancel the
|
|
# owning server task so its finally block releases the SessionContext
|
|
# and any partially initialized runtime instead of leaking per retry.
|
|
if (
|
|
self.business_task
|
|
and self.business_task is not current_task
|
|
and self.business_task is not self._close_initiator
|
|
and not self.business_task.done()
|
|
):
|
|
self.business_task.cancel()
|
|
# The business owner's finally block calls back into server
|
|
# cleanup. Waiting for it here would create a close cycle:
|
|
# close -> business finally -> transport.close -> close.
|
|
# Give cancellation one loop turn, then let it unwind
|
|
# independently while the physical socket is released.
|
|
await asyncio.sleep(0)
|
|
if not self.business_task.done():
|
|
tracker = getattr(
|
|
self.mqtt_server, "track_draining_task", None
|
|
)
|
|
if callable(tracker):
|
|
tracker(self.business_task, "MQTT业务任务")
|
|
else:
|
|
self.business_task.add_done_callback(
|
|
lambda task: self._consume_background_task(
|
|
task, "MQTT业务任务"
|
|
)
|
|
)
|
|
|
|
# 取消心跳检查任务
|
|
if (
|
|
self.keep_alive_task
|
|
and self.keep_alive_task is not current_task
|
|
and self.keep_alive_task is not self._close_initiator
|
|
and not self.keep_alive_task.done()
|
|
):
|
|
self.keep_alive_task.cancel()
|
|
await self._wait_cancelled_task(
|
|
self.keep_alive_task, "MQTT心跳任务"
|
|
)
|
|
|
|
if (
|
|
self._startup_recovery_task
|
|
and self._startup_recovery_task is not current_task
|
|
and not self._startup_recovery_task.done()
|
|
):
|
|
self._startup_recovery_task.cancel()
|
|
await self._wait_cancelled_task(
|
|
self._startup_recovery_task, "MQTT会话恢复任务"
|
|
)
|
|
|
|
# 关闭协议处理器
|
|
try:
|
|
await asyncio.wait_for(
|
|
self.protocol.close(),
|
|
timeout=self.close_timeout,
|
|
)
|
|
except asyncio.TimeoutError:
|
|
logger.warning("关闭MQTT协议处理器超时，强制中止socket")
|
|
abort = getattr(self.protocol, "abort", None)
|
|
if callable(abort):
|
|
abort()
|
|
except (asyncio.CancelledError, Exception) as e:
|
|
logger.error(f"关闭MQTT协议处理器失败: {e}")
|
|
|
|
# Publish disconnect only after the physical protocol close barrier.
|
|
try:
|
|
await self.mqtt_server.on_client_disconnected(self)
|
|
except (asyncio.CancelledError, Exception) as e:
|
|
logger.error(f"通知服务器连接关闭失败: {e}")
|
|
|
|
logger.info(f"MQTT连接已关闭: {self.client_id}")
|
|
finally:
|
|
self._close_complete.set()
|
|
|
|
async def _wait_cancelled_task(self, task: asyncio.Task, label: str) -> None:
|
|
done, _ = await asyncio.wait({task}, timeout=self.close_timeout)
|
|
if task not in done:
|
|
logger.warning(
|
|
"{}取消后{}秒仍未退出，继续释放物理连接",
|
|
label,
|
|
self.close_timeout,
|
|
)
|
|
return
|
|
try:
|
|
task.result()
|
|
except asyncio.CancelledError:
|
|
pass
|
|
except Exception as exc:
|
|
logger.error(f"{label}退出失败: {exc}")
|
|
|
|
@staticmethod
|
|
def _consume_background_task(task: asyncio.Task, label: str) -> None:
|
|
try:
|
|
task.result()
|
|
except asyncio.CancelledError:
|
|
pass
|
|
except Exception as exc:
|
|
logger.error(f"{label}退出失败: {exc}")
|