diff --git a/blivedm.py b/blivedm.py
index 431425c..928613c 100644
--- a/blivedm.py
+++ b/blivedm.py
@@ -13,24 +13,42 @@ import aiohttp
 
 logger = logging.getLogger(__name__)
 
+ROOM_INIT_URL = 'https://api.live.bilibili.com/room/v1/Room/room_init'
+WEBSOCKET_URL = 'wss://broadcastlv.chat.bilibili.com:2245/sub'
 
+HEADER_STRUCT = struct.Struct('>I2H2I')
+HeaderTuple = namedtuple('HeaderTuple', ('pack_len', 'raw_header_size', 'ver', 'operation', 'seq_id'))
+
+
+# go-common\app\service\main\broadcast\model\operation.go
 class Operation(IntEnum):
-    SEND_HEARTBEAT = 2
-    POPULARITY = 3
-    COMMAND = 5
+    HANDSHAKE = 0
+    HANDSHAKE_REPLY = 1
+    HEARTBEAT = 2
+    HEARTBEAT_REPLY = 3
+    SEND_MSG = 4
+    SEND_MSG_REPLY = 5
+    DISCONNECT_REPLY = 6
     AUTH = 7
-    RECV_HEARTBEAT = 8
+    AUTH_REPLY = 8
+    RAW = 9
+    PROTO_READY = 10
+    PROTO_FINISH = 11
+    CHANGE_ROOM = 12
+    CHANGE_ROOM_REPLY = 13
+    REGISTER = 14
+    REGISTER_REPLY = 15
+    UNREGISTER = 16
+    UNREGISTER_REPLY = 17
+    # B站业务自定义OP
+    # MinBusinessOp = 1000
+    # MaxBusinessOp = 10000
 
 
 class BLiveClient:
-    ROOM_INIT_URL = 'https://api.live.bilibili.com/room/v1/Room/room_init'
-    WEBSOCKET_URL = 'wss://broadcastlv.chat.bilibili.com:2245/sub'
-
-    HEADER_STRUCT = struct.Struct('>I2H2I')
-    HeaderTuple = namedtuple('HeaderTuple', ('total_len', 'header_len', 'proto_ver', 'operation', 'sequence'))
-
     _COMMAND_HANDLERS = {
         # 收到弹幕
+        # go-common\app\service\live\live-dm\service\v1\send.go
         'DANMU_MSG': lambda client, command: client._on_get_danmaku(
             command['info'][1], command['info'][2][1]
         ),
@@ -115,7 +133,7 @@ class BLiveClient:
         return asyncio.ensure_future(self._message_loop(), loop=self._loop)
 
     async def _get_room_id(self):
-        async with self._session.get(self.ROOM_INIT_URL,
+        async with self._session.get(ROOM_INIT_URL,
                                      params={'id': self._short_id},
                                      ssl=self._ssl) as res:
             if res.status == 200:
@@ -129,9 +147,9 @@ class BLiveClient:
 
     def _make_packet(self, data, operation):
         body = json.dumps(data).encode('utf-8')
-        header = self.HEADER_STRUCT.pack(
-            self.HEADER_STRUCT.size + len(body),
-            self.HEADER_STRUCT.size,
+        header = HEADER_STRUCT.pack(
+            HEADER_STRUCT.size + len(body),
+            HEADER_STRUCT.size,
             1,
             operation,
             1
@@ -157,7 +175,7 @@ class BLiveClient:
             heartbeat_future = None
             try:
                 # 连接
-                async with self._session.ws_connect(self.WEBSOCKET_URL,
+                async with self._session.ws_connect(WEBSOCKET_URL,
                                                     ssl=self._ssl) as websocket:
                     self._websocket = websocket
                     await self._send_auth()
@@ -193,7 +211,7 @@ class BLiveClient:
     async def _heartbeat_loop(self):
         while True:
             try:
-                await self._websocket.send_bytes(self._make_packet({}, Operation.SEND_HEARTBEAT))
+                await self._websocket.send_bytes(self._make_packet({}, Operation.HEARTBEAT))
                 await asyncio.sleep(30)
 
             except (asyncio.CancelledError, aiohttp.ClientConnectorError):
@@ -203,29 +221,29 @@ class BLiveClient:
         offset = 0
         while offset < len(message):
             try:
-                header = self.HeaderTuple(*self.HEADER_STRUCT.unpack_from(message, offset))
+                header = HeaderTuple(*HEADER_STRUCT.unpack_from(message, offset))
             except struct.error:
                 break
 
-            if header.operation == Operation.POPULARITY:
-                popularity = int.from_bytes(message[offset + self.HEADER_STRUCT.size:
-                                                    offset + self.HEADER_STRUCT.size + 4],
+            if header.operation == Operation.HEARTBEAT_REPLY:
+                popularity = int.from_bytes(message[offset + HEADER_STRUCT.size:
+                                                    offset + HEADER_STRUCT.size + 4],
                                             'big')
                 await self._on_get_popularity(popularity)
 
-            elif header.operation == Operation.COMMAND:
-                body = message[offset + self.HEADER_STRUCT.size: offset + header.total_len]
+            elif header.operation == Operation.SEND_MSG_REPLY:
+                body = message[offset + HEADER_STRUCT.size: offset + header.pack_len]
                 body = json.loads(body.decode('utf-8'))
                 await self._handle_command(body)
 
-            elif header.operation == Operation.RECV_HEARTBEAT:
-                await self._websocket.send_bytes(self._make_packet({}, Operation.SEND_HEARTBEAT))
+            elif header.operation == Operation.AUTH_REPLY:
+                await self._websocket.send_bytes(self._make_packet({}, Operation.HEARTBEAT))
 
             else:
-                body = message[offset + self.HEADER_STRUCT.size: offset + header.total_len]
+                body = message[offset + HEADER_STRUCT.size: offset + header.pack_len]
                 logger.warning('未知包类型：operation=%d %s%s', header.operation, header, body)
 
-            offset += header.total_len
+            offset += header.pack_len
 
     async def _handle_command(self, command):
         if isinstance(command, list):