* Constants and structures defined by the internet system,
* Per RFC 790, September 1981.
#define IPPROTO_ICMP 1 /* control message protocol */
#define IPPROTO_GG 2 /* gateway^2 (deprecated) */
#define IPPROTO_TCP 6 /* tcp */
#define IPPROTO_PUP 12 /* pup */
#define IPPROTO_UDP 17 /* user datagram protocol */
* Port/socket numbers: network standard functions
#define IPPORT_DAYTIME 13
#define IPPORT_NETSTAT 15
#define IPPORT_TIMESERVER 37
#define IPPORT_NAMESERVER 42
* Port/socket numbers: host specific functions
#define IPPORT_TTYLINK 87
#define IMPLINK_LOWEXPER 156
#define IMPLINK_HIGHEXPER 158
* Internet address (old style... should be updated)
struct { u_char s_b1
,s_b2
,s_b3
,s_b4
; } S_un_b
;
struct { u_short s_w1
,s_w2
; } S_un_w
;
#define s_addr S_un.s_l /* can be used for most tcp & ip code */
#define s_host S_un.S_un_b.s_b2 /* host on imp */
#define s_net S_un.S_un_b.s_b1 /* network */
#define s_imp S_un.S_un_w.s_w2 /* imp */
#define s_lhost S_un.S_un_b.s_b1 /* net library format host on imp */
#define s_lnet S_un.S_un_b.s_b2 /* net library format network */
* Socket address, internet style.