DHCP钩子程序，用于记录DHCP分配的IP和MAC的对应关系，写在内置的一个数据库中，并提供查询，可以通过访问7068端口返回指定定IP对应的IP地址-DHCP hooks, used to record the DHCP-assigned IP and MAC' s correspondence, written in a built-in database, and provide access, you can access the 7068 port to return the