Merge pull request #257 from jumpserver/dev_bai

[Update] 优化telnet连接逻辑

coco/connection.py

@@ -300,10 +300,16 @@ class TelnetConnection:
                         logger.info(msg)
                         return None, msg
 
-                    if data.startswith(telnetlib.IAC):
-                        self.option_negotiate(data)
+                    # 将数据以 \r\n 进行分割
+                    _data_list = data.split(b'\r\n')
+                    for _data in _data_list:
+                        if not _data:
+                            continue
+
+                        if _data.startswith(telnetlib.IAC):
+                            self.option_negotiate(_data)
                         else:
-                        result = self.login_auth(data)
+                            result = self.login_auth(_data)
                             if result:
                                 msg = 'Successful asset connection.<{}>/<{}>/<{}>.'.format(
                                     self.client.user, self.system_user.username,