in
# define INADDR_ANY 0x00000000
# define INADDR_BROADCAST 0xffffffff
# define INADDR_LOOPBACK 0x7f000001
# define INADDR_NONE 0xffffffff
# define IPPROTO_IP 0
# define IPPROTO_ICMP 1
# define IPPROTO_TCP 6
# define IPPROTO_UDP 17
#define IN6ADDR_ANY_INIT
#define IN6ADDR_LOOPBACK_INIT
