/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2015-02-17 Bernard First version */ #ifndef IN_H__ #define IN_H__ #include #ifndef IN6_IS_ADDR_MULTICAST #define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff) #endif #endif