#ifndef CONFIG_H#define CONFIG_H// MAC addressstruct config_mac {unsigned char mac[6];};extern struct config_mac config_mac;// IP configurationstruct config_ip {unsigned char ip[4]; ///< own IP addressunsigned char mask[4]; //</ subnet maskunsigned char gw[4]; ///< dateway IP address};extern struct config_ip config_ip;#endif // #ifndef CONFIG_H