#define IPPROTO_IP 0
#define IPPROTO_ICMP 1
#define IPPROTO_TCP 6
#define IPPROTO_UDP 17
#define IPPROTO_RAW 255
#define IPPROTO_MAX 256
#define IPPORT_RESERVED 1024
#define IPPORT_USERRESERVED 5000
#define INADDR_ANY
#define INADDR_BROADCAST
#define IN_LOOPBACKNET 127